Filter cartridge cap



FIG. 1 is a front perspective view of the filter cartridge cap of the present invention, with the rear perspective view being identical; and,

FIG. 2 is a top plan view of the filter cartridge cap of the present invention.

The bottom view is omitted as it is flat and devoid of surface ornamentation. The broken lines showing in FIGS. 1 and 2 are directed to environment and are for illustrative purposes only. The broken lines form no part of the claimed design. 

The ornamental design for a filter cartridge cap, as shown and described. 